Then you should brake up.You don't deserve to be hers replacement,if you don't end this now,you gonna end up even more hurt.Talk to your friends it might help,or if you want you can talk to me I'll listen. But just put yourself first,if he's still in love with her,then he might go back to her,so end it now.

Definetily break up with him, You don't deserve a guy like him who goes back to his ex's soon enough he's probably goin get hurt again so he knows how you feel. When he's hurt and you see him comfort him and tell him " Now you know how I felt."

talk to him tell him staight up that you want to know if he still loves his ex, if you are the only one who helped him through it then he should have feeling for you too. I f he wants to stay with her let him, there's some one out there for you.

break up with him he loves another girl its not right theres other fish in the sea and if he really loved you he wouldnt of done that .my ex boyfriend when we were dating he told me he was still in love with my bestfriend i dump him . he kept bugging me to go back out with him dont ever give in to him that was a mistake i made . he aint worth it honey im sorry. he will probubly realize she aint worth it and he will probubly admit he made a huge mistake i hope this helps :)

i totally agree